- MGM Transformer Company

MGM
TRANSFORMER COMPANY
Special Design Dry
Type Transformers
Liquid Filled and Dry
Type Substation
Transformers
Liquid Filled and Dry
Type Drives Isolation
Transformers
600V Class General
Purpose Transformers
MGM Transformer Company
Company Profile
MGM Transformer Company was established in 1975 as a dry
transformer manufacturer. After the acquisition of Sierra
MGM Transformer Company manufactures
transformers in eight major categories:
Transformer Company in 1982, MGM introduced liquid units to
its product line. By 1990, MGM Transformer had grown to
become the largest independent transformer manufacturer west
of the Mississippi.
To continue the growth of products within the transformer
world, MGM Transformer Company opened a 125,000 square foot
satellite manufacturing plant in 1991 for the production of 600V
Special Design Dry Type Transformers:
9kVA to 10MVA
1- and 3-Phase
600V to 34.5kV
K-Factor Ratings
Retrofit Applications
Dry Type Substation Transformers:
500kVA to 10MVA
5kV to 34.5kV
Indoor and Outdoor
Primary Load Interrupter Switch (optional)
class general purpose lighting transformers. Presently, there are
warehouse operations in major cities throughout the continental
United States.
The last two decades saw a significant growth in the SCR/VFD
drives industry, as users have looked for ways to improve
efficiencies to reduce power costs. MGM Transformer Company
Liquid Filled Substation Transformers:
500kVA to 10MVA
5kV to 34.5kV
Indoor and Outdoor
Primary Load Interrupter Switch (optional)
Dry Type Drives Isolation Transformers:
6, 12, 18, and 24-Pulse
15kVA to 10MVA
600V to 34.5kV
Indoor and Outdoor
has responded to this new demand with an engineering staff
that specializes in the application and design of these
sophisticated systems. Consequently, the company has become
an established leader of drives isolation transformers.
Located on a five-acre site just southeast of metropolitan Los
Angeles, the manufacturing plant encompasses 120,000 square
feet. Adjacent to the manufacturing plant is a separate 20,000
square foot facility, housing offices for administration,
engineering and sales.
Liquid Filled Drives Isolation Transformers:
6, 12, 18, and 24-Pulse
200kVA to 10MVA
5kV to 34.5kV
Indoor and Outdoor
600V Class General Purpose Transformers:
9kVA to 1,500kVA, 3-Phase
10kVA to 500kVA, 1-Phase
Special Design Dry Type Transformers
Section wound
Disk wound
The section wound style is rarely used in
industry due to higher cost vs. barrel or random
wound. MGM as a standard uses this style on all
5kV class above 45kV BIL and 15kV class to
Barrel wound
1,000kVA, and 60 to 110 kV BIL.
Continuous disk or pancake wound
style is very costly and not widely
used. Due to its superior design
criteria, MGM uses this method on
15kV class, above 1,000kVA and 60
to 125 kV BIL (150 kV BIL non-UL)
The barrel wound style is
the most common method
in the industry for 600V
and 5kV applications.
MGM only uses the barrel
wound method for 600V
class and 5kV class, 45kV
BIL maximum.
Range
9kVA-10MVA, 2.4kV/5kV, 3 phase
30kVA-10MVA, 15kV, 3 phase
500kVA-10MVA, 34.5kV, 3 phase
9kVA-2,500kVA, 600V, 3 phase
10kVA-1,667kVA, 2.4kV/5kV, 1 phase
15kVA-3,333kVA, 15kV/34.5kV, 1 phase
10kVA-500kVA, 600V, 1 phase
DESIGN SPECIFICATIONS
Aluminum/Copper
150°C / 115°C / 80°C or Special Request
220°C insulation
NEMA standard/special sound levels
ANSI standard/special BIL levels
Dip/bake or VPI (upon request)
UL K-factor ratings
UL/CUL/CE/CSA listings (check with factory)
Multi-voltage input/output
50/60/400 Hz
OEM core and coil
Multiple electrostatic shields
Design to meet customer impedance
and loss criteria
MGM Transformer Company has established itself
as a custom manufacturer of dry type
transformers. With the exceptionally large and
experienced engineering staff, the ability to
design to the varying criteria of differing
industries, while maintaining short lead times,
has positioned the company as a leader in the
transformer industry. Core and coil application
for regulators and UPS systems, low loss/high
efficiency drives isolation transformers, and
K-factor rated substation transformers for
retrofit are but a few of the special transformers
MGM has designed and manufactured.
Within the Special Design Dry Type
transformers, MGM employs three winding styles
based on kVA, voltage and BIL requirements.
The ability to select a specific winding style
assures the highest degree of mechanical
strength under short circuit stress conditions
and suitability for different voltage classes.
Most transformer companies offer standard
engineered products only, and ask the users to
make it fit their applications. MGM however, can
engineer the product both electrically and
mechanically to fit any given and unique
application.
Substation Transformers
D r y T y p e S u b s t a t i o n 1 8 0 0 k VA
Primary 6.3kV∅ Secondary 400Y/231V 50Hz;
150°C Rise; Copper Wound; Digital Temperature
Monitor; NEMA 3R Louvers; Low Voltage
Transition Section with Flex Leads
Dry Type
For over three decades, MGM Transformer
Company has been a reliable source for quality
unit substation transformers. Our standard
*Range
3-phase
500kVA-10MVA, 2.4/5kV
designs cover the full range of requirements
500kVA-10MVA, 15kV
from 5kV to 34.5kV, 500kVA to 10,000kVA, in
500kVA-10MVA, 34.5kV
both liquid and dry type.
As an engineering oriented transformer
company, we maintain a large engineering
staff. Our experience in working with various
Aluminum/Copper
switchgear manufacturers enables us to design
150°C / 115°C / 80°C
the high voltage/low voltage switchgear
220°C insulation
interface, assuring the proper match in the
Indoor/outdoor
field. Flex connectors can be supplied.
ANSI standard/special BIL levels
Non-standard substation designs are also
available for special situations such as failed
Dip/bake or VPI (upon request)
UL K-factor ratings
unit retrofitting or PCB replacement.
UL/CUL/CSA listings (check with factory)
All manufacturing processes are done on the
*DOE 2010 Compliant
premises. This advantage, along with a large
inventory of electrical steel and wire, assures
our customers of the industry's shortest lead
times, regardless of the interface requirements.
2
DESIGN SPECIFICATIONS
Substation Transformers
Liquid Filled
L i q u i d F i l l e d S u b s t a t i o n 7 . 5 M VA
Primary 22.9kV∅ Secondary 7,200Y/4,160V 60Hz;
65°C Rise; Aluminum Wound; Mineral Oil; HV/LV Throats
*Range
3-phase
500kVA-10MVA, 2.4/5kV, 3 phase only
500kVA-10MVA, 15kV, 3 phase only
500kVA-10MVA, 34.5kV, 3 phase only
DESIGN SPECIFICATIONS
Aluminum/Copper
55°C, 65°C and 55°C / 65°C
OA, OA/FFA, OA/FA
ANSI standard/special BIL levels
Indoor/Outdoor
Silicone/FR3/Mineral
Designed per ANSI/IEEE and NEMA
MGM Transformer Company has built a
reputation for providing rugged, conservatively
designed substation transformers.
Our experienced manufacturing team, backed
by a rigorous QA/QC system requirement,
results in a superior transformer in quality and
performance. With an extensive inventory of
raw materials on site, industry's shortest lead
times are maintained.
As a benefit to our customers, fused and nonfused 600A 15kV load interrupter switches
are maintained in inventory. These can be
mated to our transformers and shipped in the
same short cycle lead time as transformers
without switches.
*3,750kVA and above have a mininum
low voltage of 2400 Volts
3
Drives Isolation Transformers
Dry Type Drives Isolation
7 5 0 k VA 1 2 - P u l s e
Primary 3.3kV∅ Secondary 1,700∅/1,700Y 50Hz;
125°C Rise; Copper Wound; Electro-Static Shield;
Thermoswitches in Coils
Dry Type
MGM Transformer Company has earned the
respect of the major drives manufacturers as a
supplier of reliable, high quality drives
Range
15kVA-1,500kVA, 600V
isolation transformers. All transformers are
15kVA-10MVA, 5kV to 34.5kV
custom-designed to meet the customer's exact
specifications, using the latest ANSI/IEEE
criteria for harmonic loads. Derated standard
distribution transformer designs are never
used.
DESIGN SPECIFICATIONS
ANSI C57 (applicable section(s))
As a design-and-build transformer company,
we pride ourselves on our large and
experienced engineering staff whose extensive
experience in the drives industry has resulted
in our success as a supplier of these special
transformers. Applications ranging from pumps
and fans, to heavy duty-cycle steel rolling
mills, have been designed and manufactured.
IEEE (applicable section(s))
Indoor/outdoor
6, 12, 18, and 24-pulse applications
220°C insulation
150°C / 115°C / 80°C / special design rise
Aluminum/copper
Electro-static shield(s)
Thermal switches
We manufacture both liquid filled and
dry type, from 15kVA to 10MVA. Our customers
benefit because we are able to provide the
best solution for any specific application.
4
Drives Isolation Transformers
Liquid Filled
Liquid Filled Drives Isolation
1 , 0 0 0 k VA 1 2 - P u l s e
Primary 4.3kV∅ Secondary 2,100∅/2,100Y;
65°C Rise; Copper Wound; Electro-Static Shield;
Mineral Oil
Range
3-phase
200kVA-10MVA, 5kV to 34.5kV
DESIGN SPECIFICATIONS
ANSI C57 (applicable section(s))
IEEE (applicable section(s))
Indoor (R-temp/silicone)
Outdoor
6, 12, 18, and 24-pulse applications
55°C, 65°C and 55°C / 65°C
OA, OA/FFA, OA/FA
Aluminum/copper
Electro-static shield(s)
To meet the demands of drives applications,
special design and manufacturing processes are
utilized. Engineering's approach is to account for
worst case scenarios, assuring conservative
designs leading to long transformer life, even
under severe applications. Manufacturing utilizes
special winding techniques and equipment along
with precision assembly and blocking methods,
to maintain electrical and mechanical integrity
while under stress.
MGM Transformer Company specializes in working
with drives manufacturers to design and supply
transformers to meet their exact equipment
requirements. Once specifications are
determined, a matrix of designs and pricing can
be established for the manufacturer, streamlining
the ordering process.
With a product range to 10MVA in both liquidfilled and dry type, and an engineering staff
capable of designing to most any application,
MGM Transformer Company is positioned as a
leader in drives isolation transformer
manufacturing.
5
General Purpose Transformers
600V Class General Purpose
150kVA, 75kVA, 45kVA;
Primary 480V∅, Secondary 208Y/120V 60Hz;
150°C Rise; Aluminum Wound
MGM Transformer Company has established a
national distribution network with locations in
major cities in the continental U.S. Because
of immediate availability from warehouse
inventories and competitive pricing, MGM has
become one of the leaders in this industry.
Range
3-phase
9kVA-750kVA, 480∅-208Y/120V, 3 phase
In addition to the standard warehouse
products shown on this page, each warehouse
location can supply, by special order, virtually
any 600V class transformer to meet customer
specifications. For a sampling of the
requirements that can be supplied, please refer
to the "Special Design Dry Type Transformers"
page.
9kVA-750kVA, 480∅-240∅/120V, 3 phase
10kVA-500kVA, 240x480-120/240V, 1 phase
DESIGN SPECIFICATIONS
Aluminum & Copper
150/115/80°C temperature rise
6 primary taps: 2-2 1/2 % FCAN;
4-2 1/2 % FCBN
220°C UL insulation
NEMA 1/NEMA 3R (with kit)
UL listed
6
Energy Star ®
EMA Standard TP-1 was originally
N
developed to promote the use of higher
efficiency transformers in support of the
Department of Energy’s (DOE) guidelines for more
efficient electrical devices that reduce energy
consumption. Studies sponsored by the
Environmental Protection Agency (EPA) show that
the typical loading of low voltage (600V and
below) drytype distribution transformers averages
around 35% of the transformers full load rating
over a 24 hour period. NEMA TP-l established
minimum efficiencies for 600V-class distribution
transformers at 35% of the transformer’s full load
rating. At 35% load, when compared to standard
transformers, NEMA TP- I transformers are the
most efficient transformer. The EPA adopted the
minimum efficiencies set forth in NEMA Standard
Single-Phase
Efficiency
Rated
Capacity
(kVA)
Minimum
Efficiency
(%)
15
97.7
25
98.0
37.5
98.2
50
98.3
75
98.5
100
98.6
167
98.7
250
98.8
333
98.9
TP- 1 and incorporated them into their highly
successful Energy Star® Program.
Three-Phase
Efficiency
In applications where the average load over a 24
hour period is 35% of the transformer’s full load
rating, the energy savings that can be attained by
Rated
Capacity
(kVA)
Minimum
Efficiency
(%)
15
97.0
30
97.5
45
97.7
75
98.0
expected life of a transformer is 20 years, or more,
112.5
98.2
so the total financial savings available over the
150
98.3
life of the transformer are significant. The
225
98.5
following table lists the NEMA TP- 1 minimum
300
98.6
efficiency levels for low voltage dry type
500
98.7
distribution transformers:
750
98.8
1000
98.9
installing a NEMA TP- 1 (or Energy Star® labeled)
transformer are significant. The EPA estimates that
the payback period for the difference in price
between a standard 150˚C rise model and the
NEMA TP-l model is only 3 to 5 years. The
7
Energy Star ®
S
everal agencies and local governments have mandated the use of NEMA TP-l compliant or
Energy Star® labeled transformers. Section 161 of the Energy Policy Act of 1992 encourages
federal agencies to procure energy efficient products. Additionally, Executive Order 12902
and FAR Section 23.704 direct agencies to purchase products that are in the upper 25% of energy
efficiency. Many states have passed laws mandating the installation of NEMA TP-1 transformers as
well. Massachusetts and Minnesota were the first to pass such laws. Recently, New York State
adopted changes to its Energy Code that mandate installation of these transformers. California has
likewise adopted legislation, Title 20, which requires all low voltage dry type distribution
transformers manufactured on or after March 1, 2003 to meet the minimum efficiency levels set forth
in NEMA TP-1. More states will surely pass similar legislation in the near future in anticipation of the
passage of the 1992 Energy Act (House Resolution 776) which will require distribution transformers
across the country to meet the NEMA TP- 1 efficiency standards.
NEMA Standard TP-1, as well as most state and federal legislation, specifically excludes a broad
range of transformers classified as "specialty transformers". Among the products excluded from the
NEMA standard are: transformers rated less then 15kVA, drives transformers (Type MD transformers),
autotransformers, non-distribution transformers (such as UPS transformers), transformers designed
for high harmonics (such as K-factor rated transformers), machine tool transformers, sealed and nonventilated transformers (encapsulated transformers), transformers rated other than 60 Hz, and
retrofit transformers. Check the specific legislation in your area for exclusions that are incorporated
in your area.
As an Energy Star® partner, MGM Transformer Co. is a leader in the marketplace with solutions that
save on electricity costs while at the same time help to protect the environment. MGM Transformer
Co. offers a complete line of both single-phase and three-phase dry type distribution transformers
that meet or exceed NEMA TP-l efficiency levels. Models that comply with this standard bear the TP1 and Energy Star® symbol.
The same options and modifications are available for NEMA TP- I transformers as are for the standard
transformer offering; copper windings, special primary and or secondary voltages, 150˚C, 115˚C, or
80˚C temperature rise, stainless steel enclosures, low sound, etc.
8
NEMA TP-1 Standard Energy Efficiency
Primary Voltage 34,500 Volts and Below
Secondary Voltage 600 Volts and Below
Voltage
Liquid Rating
Single Phase
Dry Rating
Single Phase
10-833 kVA
Three Phase
15-2500 kVA
Three Phase
15-2500 kVA
Single Phase
Efficiency
kVA
10
15
26
37.5
50
75
100
167
250
333
500
667
833
98.4
98.6
98.7
98.8
98.9
99.0
99.0
99.1
99.2
99.2
99.3
99.4
99.4
kVA
10
30
45
75
112.5
150
225
300
500
750
1000
1500
2000
2500
Dry-Type
kVA
15
25
37.5
50
75
100
167
250
333
500
667
833
Medium Voltage
Low
Voltage <60kV >60kV
BIL
BIL
97.7
98.0
98.2
98.3
98.5
98.6
98.7
98.8
98.9
—
—
—
97.6
97.9
98.1
98.2
98.4
98.5
98.8
98.9
99.0
99.1
99.2
99.2
97.6
97.9
98.1
98.2
98.4
98.5
98.7
98.8
98.9
99.0
99.0
99.1
kVA
10
30
45
75
112.5
150
225
300
500
750
1000
1500
2000
2500
Low
Voltage
97.0
97.5
97.7
98.0
98.2
98.3
98.5
98.6
98.7
98.8
98.9
—
—
—
98.1
98.4
98.6
98.1
98.2
98.3
99.0
99.0
99.1
99.2
99.2
99.3
99.4
99.4
Medium Voltage
96.8
97.3
97.6
97.9
98.1
98.2
98.4
98.6
98.8
98.9
99.0
99.1
99.2
99.2
our satisfied customers. For more information, please
Drives Industry
Rockwell Automation
Rockwell Reliance
ABB
Toshiba
Three Phase
Efficiency
<60kV
BIL
MGM Transformer Company is pleased to list a sample of
contact the factory.
15-833 kVA
Liquid-Filled
MGM Transformer Company
>60kV
BIL
96.8
97.3
97.6
97.9
98.1
98.2
98.4
98.5
98.7
98.8
98.9
99.0
99.0
99.1
Cegelec
Lloyd Controls
Ansaldo-Ross Hill
Control Techniques
Industrial & Commercial
General Electric
Siemens
Westinghouse
Proctor & Gamble
Cutler-Hammer
Motorola
LTV Steel
Toyota
Hewlett-Packard
Petrochemical
Amoco Oil
Arco
Chevron
Mobil Oil
Shell Oil
Exxon
Unocal
Pulp & Paper
Weyerhauser
Eddy Paper
Georgia-Pacific
Municipalities & Utilities
AT&T
Commonwealth Edison
L.A. Department of
Water & Power
Metropolitan Water District
Florida Power & Light
Pacific Bell
Iowa Power & Light
Wisconsin Power & Light
Pacific Gas & Electric
Edison International
Architects & Contractors
ARAMCO
Bechtel
Brown & Root
Fluor Daniel
Ralph M. Parsons Co.
Black & Veatch
Universities / Labs
UCLA
UC Berkeley
UC San Diego
Fermilab
University of Michigan
University of Minnesota
Lawrence Livermore Labs
Argon National Lab
Wind-Turbine Power Generation
Palm Springs, California
Tehachapi Pass, California
Q u a l i t y
y o u
c a n
s e e
MG M Transformer Company
Tel: (323) 726-0888
5701 Smithway Street, City of Commerce, CA 90040
Fax: (323) 726-8224
Email: sales@mgmtransformer.com
© 2010 MGM Transformer Company. Specifications subject to change without notice.
URL: www.mgmtransformer.com